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  • 1
    In: Nature Chemistry, Springer Science and Business Media LLC, Vol. 12, No. 2 ( 2020-02), p. 193-201
    Type of Medium: Online Resource
    ISSN: 1755-4330 , 1755-4349
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2020
    detail.hit.zdb_id: 2464596-5
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  • 2
    Online Resource
    Online Resource
    American Meteorological Society ; 2021
    In:  Journal of Climate Vol. 34, No. 21 ( 2021-11), p. 8739-8753
    In: Journal of Climate, American Meteorological Society, Vol. 34, No. 21 ( 2021-11), p. 8739-8753
    Abstract: El Niño–Southern Oscillation (ENSO) has been recently linked with extratropical Pacific Ocean atmospheric variability. The two key mechanisms connecting the atmospheric variability of the extratropical Pacific with ENSO are the heat flux–driven “seasonal footprinting mechanism” (SFM) and the ocean dynamics–driven “trade wind charging” (TWC) mechanism. However, their relative contributions to ENSO are still unknown. Here we present modeling evidence that the positive phase of the SFM generates a weaker, short-lived central Pacific El Niño–like warming pattern in the autumn, whereas the TWC positive phase leads to a wintertime eastern Pacific El Niño–like warming. When both mechanisms are active, a strong, persistent El Niño develops. While both mechanisms can trigger equatorial wind anomalies that generate an El Niño, the strength and persistence of the warming depends on the subsurface heat content buildup by the TWC mechanism. These results suggest that while dynamical coupling associated with extratropical forcing is crucial to maintain an El Niño, thermodynamical coupling is an extratropical source of El Niño diversity.
    Type of Medium: Online Resource
    ISSN: 0894-8755 , 1520-0442
    RVK:
    Language: Unknown
    Publisher: American Meteorological Society
    Publication Date: 2021
    detail.hit.zdb_id: 246750-1
    detail.hit.zdb_id: 2021723-7
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  • 3
    In: Journal of Thrombosis and Haemostasis, Elsevier BV, Vol. 20, No. 6 ( 2022-06), p. 1331-1349
    Type of Medium: Online Resource
    ISSN: 1538-7836
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2022
    detail.hit.zdb_id: 2099291-9
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  • 4
    In: Rubber Chemistry and Technology, Rubber Division, ACS, ( 2023-10-11)
    Abstract: Rubber-based polymers with high carbon black content can be three-dimensionally (3D) printed using the additive manufacturing of elastomers process. However, high-viscosity materials limit printing resolution, making it difficult to produce fine structures and high-precision parts, especially two-component (2K) parts. The viscosity of a rubber compound used for rod seal applications was reduced and adjusted using Nipol® 1312 liquid rubber and the alkyl sulfonic phenyl ester Mesamoll® II as plasticizers to lower the torque level during extrusion when a reduced nozzle diameter of 0.4 mm is used in 3D printing. In addition, the flowability of the compound was enhanced prior to vulcanization of the part, which could increase the layer–layer bond and thus reduce the mechanical anisotropy typically induced by fused filament fabrication. Using a viscosity-optimized rubber compound, a 2K rod seal consisting of a thermoplastic polyurethane with elastomeric properties and an acrylonitrile rubber-based O-ring was produced and dynamically tested for leakage.
    Type of Medium: Online Resource
    ISSN: 1943-4804 , 0035-9475
    Language: English
    Publisher: Rubber Division, ACS
    Publication Date: 2023
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  • 5
    Online Resource
    Online Resource
    American Meteorological Society ; 2020
    In:  Journal of Climate Vol. 33, No. 17 ( 2020-09-01), p. 7391-7411
    In: Journal of Climate, American Meteorological Society, Vol. 33, No. 17 ( 2020-09-01), p. 7391-7411
    Abstract: During the positive phase of the North Pacific Oscillation, westerly wind anomalies over the subtropical North Pacific substantially increase subsurface heat content along the equator by “trade wind charging” (TWC). TWC provides a direct pathway between extratropical atmospheric circulation and El Niño–Southern Oscillation (ENSO) initiation. Previous model studies of this mechanism lacked the ocean–atmospheric coupling needed for ENSO growth, so it is crucial to examine whether TWC-induced heat content anomalies develop into ENSO events in a coupled model. Here, coupled model experiments, forced with TWC favorable (+TWC) or unfavorable (−TWC) wind stress, are used to examine the ENSO response to TWC. The forcing is imposed on the ocean component of the model through the first winter and then the model evolves in a fully coupled configuration through the following winter. The +TWC (−TWC) forcing consistently charges (discharges) the equatorial Pacific in spring and generates positive (negative) subsurface temperature anomalies. These subsurface temperature anomalies advect eastward and upward along the equatorial thermocline and emerge as like-signed sea surface temperature (SST) anomalies in the eastern Pacific, creating favorable conditions upon which coupled air–sea feedback can act. During the fully coupled stage, warm SST anomalies in +TWC forced simulations are amplified by coupled feedbacks and lead to El Niño events. However, while −TWC forcing results in cool SST anomalies, pre-existing warm SST anomalies in the far eastern equatorial Pacific persist and induce local westerly wind anomalies that prevent consistent development of La Niña conditions. While the TWC mechanism provides adequate equatorial heat content to fuel ENSO development, other factors also play a role in determining whether an ENSO event develops.
    Type of Medium: Online Resource
    ISSN: 0894-8755 , 1520-0442
    RVK:
    Language: Unknown
    Publisher: American Meteorological Society
    Publication Date: 2020
    detail.hit.zdb_id: 246750-1
    detail.hit.zdb_id: 2021723-7
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  • 6
    Online Resource
    Online Resource
    Walter de Gruyter GmbH ; 2023
    In:  Zeitschrift für wirtschaftlichen Fabrikbetrieb Vol. 118, No. 4 ( 2023-03-31), p. 269-275
    In: Zeitschrift für wirtschaftlichen Fabrikbetrieb, Walter de Gruyter GmbH, Vol. 118, No. 4 ( 2023-03-31), p. 269-275
    Abstract: Der Cyberspace ist ein ständig wachsendes und modernisiertes Umfeld, das angesichts der Interkonnektivität Chancen für die digitale Transformation bietet. Aus der Integration der physischen Umgebung mit der virtuellen Welt entstehen jedoch auch Herausforderungen, die im Ökosystem der Industrie 4.0 gelöst werden müssen. So führen Konnektivität, Virtualisierung und Digitalisierung sowie Charakteristika des Engineerings (E4.0) zu Herausforderungen in Bezug auf die Cybersicherheit in einem Ökosystem, das Cyber-physische Systeme (CPS) und Digitale Zwillinge (DZ) integriert. Die Verwendung digitaler Geräte durch Konnektivität im Product Lifecycle Management (PLM) kann die Angriffsfläche für Cyber-Attacken erhöhen. Daher soll in diesem Beitrag ein Ansatz für die wichtigsten Cybersicherheitsrisiken vorgestellt werden, die durch die Integration von I4.0-Technologien in Produktionsumgebungen entstehen können. Zudem wird ein spezifischer Fahrplan für die PLM-Cybersicherheit vorgestellt und Beiträge zur Cybersicherheit im DZ erörtert.
    Type of Medium: Online Resource
    ISSN: 2511-0896 , 0947-0085
    RVK:
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    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2023
    detail.hit.zdb_id: 2133068-2
    detail.hit.zdb_id: 1225290-6
    SSG: 3,2
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  • 7
    In: Clinical Neurology and Neurosurgery, Elsevier BV, Vol. 199 ( 2020-12), p. 106305-
    Type of Medium: Online Resource
    ISSN: 0303-8467
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2020
    detail.hit.zdb_id: 2004613-3
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  • 8
    Online Resource
    Online Resource
    Oxford University Press (OUP) ; 2022
    In:  European Journal of Endocrinology Vol. 187, No. 3 ( 2022-09-01), p. 349-359
    In: European Journal of Endocrinology, Oxford University Press (OUP), Vol. 187, No. 3 ( 2022-09-01), p. 349-359
    Abstract: In Cushing’s disease (CD), detection of an adenoma by MRI is challenging. The aim of this study is to compare real-life MRI in the initial diagnostic workup of CD with high-quality MRI performed in a tertiary center for pituitary diseases. Design and methods We retrospectively analyzed 139 patients with CD who underwent primary transsphenoidal surgery (TSS) in our department and had both an MRI conducted at a different institution (external MRI; extMRI) and an MRI conducted at our institution (internal MRI; intMRI). Preoperative interpretation of MRI was performed independently by an external radiologist (extRAD), an internal neuroradiologist (intRAD) and a pituitary surgeon (SURG). Intraoperative detection of an adenoma and endocrinological remission provided proof of the true adenoma localization in 105 patients. Results Interpretation of extMRI by extRAD and SURG was concordant in only 64% (89/139) of cases, while 74.1% (103/139) concordance was observed for interpretation of intMRI by intRAD and SURG. Based on extMRI, the true localization of the adenoma was correctly predicted in only 46.7% of the patients by extRAD and in 65.7% by SURG. In contrast, the sensitivity to correctly identify the adenoma on intMRI was 80.0% for intRAD and 94.3% for SURG. Conclusion Both the quality of MRI and the reader’s experience are paramount for detection of microadenomas in CD. Every effort should be made to perform high-quality initial MRI according to current standards and to ensure rating by an expert in pituitary imaging.
    Type of Medium: Online Resource
    ISSN: 0804-4643 , 1479-683X
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    Language: Unknown
    Publisher: Oxford University Press (OUP)
    Publication Date: 2022
    detail.hit.zdb_id: 1485160-X
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  • 9
    In: International Journal of Climatology, Wiley, Vol. 41, No. 13 ( 2021-11-15), p. 5977-5997
    Abstract: More than 90% of excess energy trapped by greenhouse gases is accumulated in the oceans. Ocean heat content (OHC) and its changes are therefore fundamental metrics to monitor climate change. However, due to sparse observation sampling before the 1950s, accurate observation‐based estimations only exist for the second half of the 20th century. A 16‐member ensemble of historical ocean reanalyses is used for the first time to compile a unique estimate of 20th century oceanic warming rates. The reanalyses combine dynamical ocean general circulation models with historical observations and observation‐based atmospheric forcing. Ocean heat content tendencies (OHCT) from the multireanalysis ensemble (MRE) agree well with independent estimates of ocean heat content, and show a coherent evolution with records of Earth's energy imbalance from atmospheric reanalyses and atmospheric CO 2 concentration at a range of timescales. OHCT from reanalyses proves to be a more effective climate change proxy, that is, more closely related to independent climate indexes, than observed surface warming tendencies that contain high‐frequency variability not related to the climate change signature, or historical coupled model simulations, which neglect interannual fluctuations. The ensemble mean estimate of the century‐long ocean warming rate is 0.26 ± 0.08 W m −2 . The warming rate of 0.84 ± 0.21 W m −2 estimated from 1993 onwards is unprecedented. The global decadal warming rate is persistently positive from about 1925 onwards, except for two neutral periods. The Indian Ocean exhibits the highest relative contribution to centennial heat accumulation, while the Atlantic Ocean plays an increasingly prominent role, especially during the 1995–2004 decade. These findings are in agreement with previous studies.
    Type of Medium: Online Resource
    ISSN: 0899-8418 , 1097-0088
    URL: Issue
    RVK:
    Language: English
    Publisher: Wiley
    Publication Date: 2021
    detail.hit.zdb_id: 1491204-1
    SSG: 14
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  • 10
    Online Resource
    Online Resource
    Journal of Neurosurgery Publishing Group (JNSPG) ; 2020
    In:  Journal of Neurosurgery Vol. 132, No. 5 ( 2020-05), p. 1425-1434
    In: Journal of Neurosurgery, Journal of Neurosurgery Publishing Group (JNSPG), Vol. 132, No. 5 ( 2020-05), p. 1425-1434
    Abstract: Craniopharyngiomas are rare and benign tumors of the sellar and/or parasellar region. Primary treatment involves resection followed by adjuvant radiotherapy. While the grade of resection was frequently analyzed following surgery, the neurological outcome and especially neuropsychological deficits and quality of life have been neglected for many decades. Therefore, the authors retrospectively analyzed their patient series and prospectively assessed neuropsychological outcome and quality of life following resection of craniopharyngiomas in adults. METHODS In total, 71 patients (39 men and 32 women) with a mean age of 49 years were enrolled in the retrospective analysis. In addition, 36 of the 71 patients were included in the prospective arm of the study and underwent neurological and neuropsychological testing as well as quality of life (36-Item Short-Form Health Survey; SF-36) assessment. Factors influencing outcome were identified and correlations calculated. RESULTS Resection was performed mostly using a pterional (41.6%, 47/113 surgical procedures) or bifrontal translamina terminalis (30.1%, 34/113 surgical procedures) approach. Following surgery, visual acuity was significantly improved ( 〉 0.2 diopters) in 32.4% (23/71) of patients, or remained stable in 45.1% (32/71) of patients. During long-term follow up, 80.3% (57/71) of patients developed pituitary insufficiency, particularly involving the corticotropic and thyrotrophic axes. In total, 75% (27/36) of patients showed neuropsychological deviations in at least 1 test item. In particular, attentiveness, cognitive speed, and short-term memory were affected. Referring to the SF-36 score, quality of life was affected in both the mental and physical score in 19.4% (7/36) and 33.3% (12/36), respectively. The risk factors that were identified were a tumor volume larger than 9 cm 3 , tumor extension toward/into the third ventricle or the brainstem, and resection using a bifrontal translamina terminalis or left-sided approach. CONCLUSIONS This study demonstrated that resection of craniopharyngiomas is frequently associated with postoperative neuropsychological deficits and hence an impaired quality of life. In addition to tumor size and extension toward/into the third ventricle or the brainstem, selection of the surgical approach may play a crucial role in the patient’s neuropsychological outcome and quality of life.
    Type of Medium: Online Resource
    ISSN: 0022-3085 , 1933-0693
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    Language: Unknown
    Publisher: Journal of Neurosurgery Publishing Group (JNSPG)
    Publication Date: 2020
    detail.hit.zdb_id: 2026156-1
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